The astronomer William Herschel — the same man who discovered infrared light and the planet Uranus — gave them that name, because they appeared like small green disks through the eyepiece.

天文学家威廉·赫歇尔——也是发现红外光和天王星的人——给它们取了这个名字，因为它们通过目镜看起来像小小的绿色圆盘。